Sofa



FIG. 1 is a front elevation view of a sofa in accordance with the newdesign;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side perspective view, an opposite side perspective viewbeing a mirror image thereof; and,

FIG. 4 is a back perspective view thereof.

The broken lines shown on the sofa are understood to representstitching.

The ornamental design for a sofa, as shown and described.